Tool.



H. NHTEBERG.

TOOL.

APPLICATION FILED MAR` 22. I9l5.

19149398., Patented Aug. 10, 19l5.

@www Uw om Niteberf me/15A i used.

HAROLD NITTEBERG, OF DETROIT, MICHIGAN.

TOOL.

Specification of Letters Patent.

Patented Aug. 10, 1915.

Application filed March 22, 1915. Serial N o. 15,999.

`To all whom it may concern i This invention relates to a combined drillV and center reamer for presses and lathes, and the primary object of my-invention is to provide a. tool of the above. type with a novel reversible and detachable sleeve, which permit of either end of the tool being housed or inclosed while the opposite end thereof is Another object of this invention is to provide a combined drill and center reamer wherein a novel drill chuck is furnished with means for preventing rotation' of a drill or instrument held by the chuck.

The above and other -objects are attained by a tool wherein the parts are' constructed with a View of reducing the cost of manu- Ifacture and at the same time retain the features by which accuracy, durability, simplicity and ease of assembling` are secured,A `and with such ends in View, my invention resides inthe novel construction to be hereinafteispecifically described and then claimed.

Figure 1 is a side elevation of a tool in accordance with this invention; Fig. 2 is a' view of one end of the tool; Fig. 3 is a view of the opposite end thereof; Fig. 4 is a longitudinal sectional view of the tool, and Fig.

5 is an elevation of a detached drill chuck,

partly broken away and partly in section.

A tool in accordance with this invention comprises a barrel 1 and at one end of the .barrel the walls of the bore 2 thereof are Vscrewthreaded to receive the screwthreaded shank 3 of a reamer 4, said reainer corresponding in diameter to the barrel 1 and abutting the end thereof. .T he reamer 4l has a suitable cutter or bit 5. h

.The walls of the bore 2 at the opposite ends of the barrel 1 are tapered outwardly to provide a conical seat 6 and thewalls adjacent to'the seat 6 are screwthreaded, as at 7. This end of the barrel receives a drill chuck,

' comprising a tubular member 8 having an exteriorly screwthreaded portion y9 to engage the screwthreads 7 and a conical head 10 to engage the seat 6 ofthe barrel 1. The conical head 10 is slitted, as at 11 topiovide opposed coinpressible gripping jaws 12 and said Jaws are cut away, as at 13 to provide facets adapted to accommodate'a spanner wrench orother tool employed for mounting the drill chuck in the'bari'el. the drill chuck extend approximately half the length of the tubular member Sand at the .inner endof said member is a stop 14 having a flat face 15 adapted to be engaged by the semi-cylindrical end 16 of a tool shank 17 placed -in ,the chuck. The tool shank 17 is adapted to be clamped between the jaws or sections of the conical head 10 by the jaws or sections beingcompressed The slits of when the conical head is seated inv the end of the barrel 1. The stop 1/1 and the seini-cy- The barrel 1, intermediate the ends there- I of, is provided with diametrically opposed pins 1S adapted to extend into bayonet shaped slots 1l) provided therefor in the ends of a. sleeve 20 placed upon the barrel 1.

The sleeve 20, for the greaterpart of its length is knurled or roughened to facilitate shifting thesleeve upon the barrel and one end of the sleeve terminates in a nose 21A havingan axial opening 22 adapted to receive the'center pin or stud of the head stock of a lathe. The 'manner of detachably mounting the sleeve Q0 upon tliebari'e 1 permits of the sleeve being placed u'pon the barrel 1 to inclose the drill chuck end thereof, thus permitting of the i'eamer end of the tool being used. i*

It isthought that the utility of a combination drill and center reainer will be apparent to artisans skilled in the use of lathes and drill chucks, and while in the drawings there is illustrated a preferred embodiment lbe held by said chuck, and a sleeve detachably mounted upon said barrel and having a ioo .copies of this ptent may be obtained for nose adapted to inclose :in end ofl said bm. rel, the nose of said sleeve having an axial opening therein.

2. A tool of 'the type described, comprising a barrel, o. rciuner in slcrewthreadecl engagement with one end thereofl a drill chuck detachably connected to the opposite end 0f said barrel, a drill non-rotatably mounted in said chuck, and a sleeve on said barrel having a pin and bafvonet slot connection there- 10 with, said sleeve having a. nose provided with an axial opening.

'In testimony whereof I aX my signature ANNA M. Donn, KARL H. BUTLER.

Washington, D. C.

ve cents ech, by addressing thc Commissioner of Patents, 

